Drill-press.



W. ROBERTSON.

DRILL PRESS. APPLICATION rum) APR. 21, 1911.

1,032,430. Patented July 16, 1912. 1, Q 2 SHEETSSHEET 1.

- Illflllllll and COLUMBIA PLANOURAPH C01, WASHINGTON *rnrr orr.

WILLIAM ROBERTSON, OF BUFFALO, NEW YORK, ASSIGNOR TO FRONTIER IRON WORKS, 0F BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

DRILL-PRESS.

LOSZASO.

Specification of Letters Patent.

Patented July 16, 1912.

To all whom it may concern.

Be it known that l, lVLILLmM ROBERTSON, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Drill-Presses, of which the following is a specification.

This invention relates to a drill press and has the object to provide simple, convenient and reliable means for tilting the work supporting table so that the work piece secured thereto may be economically and expeditiously drilled, reamed or otherwise treated at different angles.

In the accompanying drawings consisting of 2 sheets: Figure 1 is a side elevation of a drill press equipped with my improved tilting table. Fig. 2 is a fragmentary sectional elevation, on an enlarged scale, showing my improved means for tilting the table on the knee or bracket of the column. Fig. 3 is a vertical section in line 3-3, Fig. 2. Fig. L is a fragmentary horizontal section inline 4-4;, Fig. 2. Fig. 5 is a fragmentary vertical section showing a modification of my invention. Fig. 6 is a bottom plan view thereof.

Similar letters of reference indicate c0rresponding parts throughout the several views.

In its general organization the drill press shown in the drawings for illustrating my improvements comprises a base 1, a column 2 rising from the base, a knee or bracket 5 adjustable vertically on the lower part of the column, a table or platen t for supporting the work piece, and a vertical drill spindle 5 mounted on the overhanging upper part of the column and carrying a drill 6 or other tool which is adapted to operate on the work piece supported by the table.

The embodiment of my improvement which is shown in Figs. 1-4 for mounting the table on the bracket so that it can be tilted into different angles is constructed as follows: 7, 8 represent the inner and outer sections of a horizontal bearing formed on the outer end of the bracket and 9 a space formed in the bracket in rear of the rear bearing section, this space being preferably formed by casting this part of the bracket hollow. The table is adjustably mounted on the bracket by means of a swivel having a horizontal cylindrical shank or arbor 10 preferably of tubular form ournaled in the bearing '2', 8 of the bracket and provided at, its outer end with a bearing 11 which is arranged pcrpendicular to the bearing of the bracket and the shank and in which is j ournaled a stem or stud 12 depending from the underside of the table. By means of the pivotal connection 12 and 11 the table may be turned circumfercntially on the swivel and upon rotating the shank 10 in the bearing 7, S the table may be tilted for bringing the work piece into position relatively to the drill or other tool for operating on the work piece at the desired angle. The circumferential turning of the table is effected by taking hold of the same directly by hand. The vertical turning of the swivel together with the table mounted thereon is effected by means of an annular row of worm gear teeth 13 formed on the periphery of the shank 10 between the bearing sections 7, 8, a worm 1% arranged transversely below the shank and meshing on its upper side with the lowermost worm teeth, and an adjusting shaft 15 journaled in transverse bearings 16, on the bracket below the shank and carrying the worm. The opposite ends 17 of this adjusting shaft project beyond the outer sides of the bracket and are constructed of prismatic form so as to enter the cor respondingly shaped socket 18 of a wrench whereby the adjusting shaft may be turned manually. Upon turning the adjusting shaft in one direction or the other the worm thereof turns the swivel, and the table mounted thereon may be shifted until the table is tilted at the desired angle for supporting the work in the proper position to be operated upon.

Means are provided which permit of adjusting the table at a predetermined angle, these means consisting preferably of a scale or graduation 30 arranged on the periphery of a flange 31 on the swivel and cooperating with a mark 32 on a corresponding flange 33 formed on the outer end of the supporting bracket. Although the worm gearing between the adjusting shaft and the swivel will hold the table and swivel in any position in which these parts have been adjusted it is desirable to clamp the swivel on the bracket, so as to hold the table and work. piece more firmly. This is preferably effected by providing the horizontal bearing of the bracket with a longitudinal slit 19 and connecting the parts of this bearing on 0pposite sides of the slit by means of a transrear of the rear bearing section 8 and a retaining screw 22 arranged horizontally in an opening in the web and engaging its threaded end with the rear end-of the shank while its head bears against the rear side of the web. Loosening of the retaining screw is prevented by a set screw 23 arranged transversely in the inner part of 'the shank and engaging with the side of the retaining screw, as shown in Fig. 2.

By the use of my improved table tilting mechanism a considerable saving in time is effected particularly when drilling or reaming holes at different angles in the same work piece inasmuch as the same has to be fastened but once to the table after which the table can be easily and quickly adjusted to suit the various requirements of the work piece.

If desired, the worm wheel 130 maybe -arranged on the shank 100 between the graduated flange 310, and the bearing 110 and the worm 1 10 which engages with the inner end of said shank with said web and operating to hold said shank in said bearing, and a table mounted on said swivel.

2. 'A drill press comprising a hollow supporting bracket provided with a bearing, a longitudinal slit on one side of said bearing, a clamping screw connecting the parts of the bearing on opposite sides of said slit, and an internal web adjacent to the inner end of said bearing, a swivel having a horizontal shank journaled in said bearing, a retaining screw pivotally connecting the inner end of said shank with said web and operating to hold said shank in said bearing, and a table mounted on said swivel.

WVitness my hand this 17th day of April,

- WILLIAM ROBERTSON.

WVitnesses: I

A. E. BRIGGS, W. J. OEINGK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

